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Refactor monitor/commands/commands.asm

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This commit is contained in:
mebibytedraco 2023-12-22 23:16:57 -05:00
parent 70a9006fb3
commit da4adbb916
1 changed files with 31 additions and 44 deletions
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75
monitor/commands/commands.asm
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@ -1,53 +1,20 @@
; command parser
; FIXME: thjs is a terrible way to do this
monitor_shell_parse_command:
mov r0, MONITOR_SHELL_TEXT_BUF_BOTTOM
; exit
mov r1, monitor_shell_exit_command_string
; loop over the table of commands
mov r2, monitor_shell_command_table
monitor_shell_parse_command_loop:
mov r1, [r2]
call compare_string
ifz jmp monitor_shell_exit_command
; help
mov r1, monitor_shell_help_command_string
call compare_string
ifz jmp monitor_shell_help_command
; jump
mov r1, monitor_shell_jump_command_string
call compare_string
ifz jmp monitor_shell_jump_command
; list
mov r1, monitor_shell_list_command_string
call compare_string
ifz jmp monitor_shell_list_command
; load
mov r1, monitor_shell_load_command_string
call compare_string
ifz jmp monitor_shell_load_command
; reg
mov r1, monitor_shell_reg_command_string
call compare_string
ifz jmp monitor_shell_reg_command
; set.8
mov r1, monitor_shell_set8_command_string
call compare_string
ifz jmp monitor_shell_set8_command
; set.16
mov r1, monitor_shell_set16_command_string
call compare_string
ifz jmp monitor_shell_set16_command
; set.32
mov r1, monitor_shell_set32_command_string
call compare_string
ifz jmp monitor_shell_set32_command
; if the string matches, jump to the corresponding address in the table
ifz jmp [r2+4]
; otherwise, move to the next entry
add r2, 8
; if the entry is zero, then we have reached the end of the table
cmp [r2], 0
ifnz jmp monitor_shell_parse_command_loop
; invalid command
mov r0, monitor_shell_invalid_command_string
@ -56,6 +23,26 @@ monitor_shell_parse_command:
ret
monitor_shell_command_table:
data.32 monitor_shell_exit_command_string
data.32 monitor_shell_exit_command
data.32 monitor_shell_help_command_string
data.32 monitor_shell_help_command
data.32 monitor_shell_jump_command_string
data.32 monitor_shell_jump_command
data.32 monitor_shell_list_command_string
data.32 monitor_shell_list_command
data.32 monitor_shell_load_command_string
data.32 monitor_shell_load_command
data.32 monitor_shell_reg_command_string
data.32 monitor_shell_reg_command
data.32 monitor_shell_set8_command_string
data.32 monitor_shell_set8_command
data.32 monitor_shell_set16_command_string
data.32 monitor_shell_set16_command
data.32 monitor_shell_set32_command_string
data.32 monitor_shell_set32_command
data.32 0 data.32 0
monitor_shell_invalid_command_string: data.str "invalid command" data.8 10 data.8 0
; all commands